AQUATIC INSECTS IN THE ADIRONDACKS 



399 



friend, Dr Westcott, using. The lantern part is of the " search light " 

 type to be found on the market, with large parabolic reflector having 

 projecting edges. The trap part consists of a 

 circular flaring band of tin, whose slope con- 

 tinues that of the edges of the reflector, inside 

 which it is pushed and fastened. It has two 

 transversely placed sheets of wire screen within 

 it, arranged as shown in the accompanying 

 figure, and on the lower side within the trap 

 there is an open, detachable cup to hold the 

 cyanid of potassium. It is easily managed and 

 very eflective, and the specimens are in the 

 main obtained in good condition. The lantern 

 of the markets has many advantages in the way 

 of conveniences over lanterns of home construc- 

 tion. 



Fig. 



iiagram of 



3 Sectional 

 lantern trap 

 R, edge of lantern 

 V the globe 



IV edge of parabolic reflector 

 S, the trap 



a catch for attachment to 



reflector 

 6 the entrance between two 



sheets of screen 

 c detachable cyanid cup 



Assistance in preparing this report. At 



the conclusion of my work at Saranac Inn, I 

 went to Cambridge Mass., where, through the 

 courtesy of Mr Samuel Henshaw, I was allowed 

 to spend several weeks determining the specimens I had collected, by 

 comparison with specimens in the museum of comparative zoology. 

 During this time Mr -Henshaw showed me many kindnesses and took the 

 trouble himself to determine the names of a number of species. I am 

 also under special obligation to Mr D. W. Coquillett and Mr William H. 

 Ashmead, of the U. S. national museum, for the study and determination 

 of numerous Diptera and Hymenoptera respectively, and for the descrip- 

 tions of new species sent me by them to be published as a part of this 

 report. I am indebted, also, for determinations, to a number of other 

 gentlemen, as follows : Trichoptera, Nathan Banks; Orthoptera, Dr S. H. 

 Scudder; Homoptera, Prof. Herbert Osborn ; leeches, Dr W. E. Castle 

 and Dr J. Percy Moore ; moUusks, Frank C. Baker ; an entomostracan, 

 Prof. E. A. Birge. 



The colored plates have been made by L. H. Joutel. The figures of 

 Trichoptera are by Mrs J. H. Comstock. Those of Diptera, Plecoptera 

 and Ephemerida are by Miss Maude H. Anthony. Those of Odonata 

 are drawn by myself. The figures made from photographs taken by 

 other persons than myself, contain the proper acknowledgment in their 

 legends. 



